Good evening,
the final index doesn't mention Xenophanes (https://archive.org/details/opusculatria00porpuoft/page/212/mode/2up?q=xenophanes).

This book doesn't seem to be the "De vita pythagorae" as it is likned at the following URL: https://catalog.perseus.org/catalog/urn:cts:greekLit:tlg2034.tlg002.opp-grc1.

I am looking for the Porhirius biography on Pythagoras beacause it affirms at chapter 6 Pythagor was a "relative of" Xenophanes, among other useful informations. Hope to find the book with your courtesy help.

Let you have a good Christmas day in the holy name of our Lord Jesus Christ.

Best regards
Marco De Antoni Ratti